25748660257 has 2 divisors, whose sum is σ = 25748660258. Its totient is φ = 25748660256.

The previous prime is 25748660219. The next prime is 25748660281. The reversal of 25748660257 is 75206684752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25665321616 + 83338641 = 160204^2 + 9129^2 .

It is a cyclic number.

It is not a de Polignac number, because 25748660257 - 2¹¹ = 25748658209 is a prime.

It is a super-2 number, since 2×25748660257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25748660297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12874330128 + 12874330129.

It is an arithmetic number, because the mean of its divisors is an integer number (12874330129).

Almost surely, 2^25748660257 is an apocalyptic number.

It is an amenable number.

25748660257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25748660257 is an equidigital number, since it uses as much as digits as its factorization.

25748660257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 25748660257 in words is "twenty-five billion, seven hundred forty-eight million, six hundred sixty thousand, two hundred fifty-seven".